Larnec

Doors for modular buildings

Purpose-Built Modular Doors to Suit Your Wall Type

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Manufactured in Australia

Manufactured in Australia

Easy installation

Easy installation

Custom Options

Custom options to suit your business

High quality materials and construction

High-quality materials and construction

Whether it’s a remote mining camp, a critical healthcare facility, a data centre, or a modular building on site — Larnec modular doors are engineered and manufactured to perform. Built tough, customised to spec, and backed by proven Australian manufacturing, our doors help protect people, assets, and environments across industries.

Designed for Demanding & Controlled Environments

Mining & Remote Site Applications

In mining and remote operations, durability isn’t optional — it’s essential. Our modular doors are engineered to withstand heavy use, vibration during transport, dust, heat, wind loads and harsh site conditions.

Ideal for:

  • Accommodation units
  • Crib rooms & site offices
  • Switch rooms & plant buildings
  • Ablution blocks
  • Workshops and service buildings

Built tough, pre-hung for efficient installation, and manufactured to integrate seamlessly with modular wall systems, Larnec doors help maintain safety, security and operational continuity on site.

Sentry 200.TA

Healthcare & Controlled-Environment Applications

Precision environments demand reliable separation and hygiene control. Our modular door systems support hospitals, laboratories, cleanrooms and medical facilities with:

  • Smooth, easy-to-sanitize finishes
  • Compatible vision panels
  • Tight sealing for environmental control
  • Insulated cores for thermal performance

Designed to integrate with insulated panel systems, these doors help maintain controlled internal conditions without compromising durability.

controlled environment door

Mission-Critical & Secure Areas

For data centres, battery rooms, communications hubs and secure infrastructure spaces, door performance plays a critical role in asset protection and operational resilience.

We offer:

  • Enhanced perimeter seals
  • Thermal and insulated core options
  • Heavy-duty hardware configurations
  • Access control compatibility
  • Fire-rated solutions where required

Each door set is configured to suit your wall construction and performance specification — ensuring reliability in high-consequence environments.

modular fire doors
Sentry 200.PB

Sentry 200.PB

Or

Sentry 250.PBRJ

Sentry 250.PBRJ

Or

Sentry 200.BF

Sentry 200.BF

Dual-skin, heavy-duty metal-clad container door system.

Or

Sentry 200.CD

Sentry 200.CD

Or

sentry 700.80 preview

Sentry 700.80

Or

air relief grille product

Air Relief Grille

TDS sample preview

Check out our spec sheets for modular building doors in the industry

Australian Made Logo

Larnec, proudly Australian made

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Manufactured in Australia
Manufactured in Australia

All our doors are manufactured in our Australian facilities to the highest quality standards. You can expect a consistent result every time.

Easy installation
Easy installation

Our doors can be easily installed on-site without the need for numerous tools and helpers.

Custom Options
Custom options to suit your business

All our doors come with a variety of options for hardware and accessories. We can also design and manufacture custom doors to suit your needs.

High quality materials and construction
High-quality materials and construction

Our doors are robust and durable enough to withstand heavy use and harsh conditions, and they will last for many years to come.

Modular Building in 4 easy steps

1

Get free advice

2

Order confirmation

We organise the contracts for your order and schedule your doors for production.

3

Manufacturing

We manufacture your doors in our Australian facilities using the Toyota Production System.

4

Delivery

We deliver to site, store or consolidation centre for consolidation for shed kits for installation.

TDS sample preview

Download brochures and specifications for all our doors

Get all the details you need to specify Larnec for your next project.

Frequently asked questions

Can you ship right across Australia?

We can. Partnering with Toll, we can deliver our doors right across the country — even to remote mining sites many kilometres away from the nearest city or town.

My mine has especially harsh conditions (like heat, salt and heavy winds). Can you build specialty doors for our location?

Yes. At Larnec, we can work with you to build specialty doors for all sorts of mining environments. Get in touch with our team and talk about the doors you need, and we’ll show you what is possible.

Are you able to supply wind-rated doors and cyclone-rated doors?

Absolutely. The wind and cyclone-rated doors that we can manufacturer for your business meet and exceed the standards for wind pressure as defined in AS/NZ 1170.2.2011 and AS 4055-2012.

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Sentry 200.PB.1
Australian Made Logo

Sentry 200.PB

Dual-skin, fully metal-clad industrial personal access door.

The market’s leading fully metal-clad industrial door for portable buildings

These doors have been designed and engineered to meet the strenuous demands that are associated with transportable and modular buildings.

Fully metal clad and semi-solid, these steel facing doors are pre-hung into one of 4 door frame options, and are powder coated to suit. Fitted with perimeter doorframe seals to counter the most violent dust storms and unfavourable weather, these doors are also supplied with a quality knob/lever (egress) exit set and three industrial-grade hinges.

Available in the complete Classic & Contemporary ranges of COLORBOND steel colours, with standard door size of 2040mm(h) x 820mm(w), with 920mm(w) and 1100mm(w) available as standard, with high and custom sizes available.

Applications

Image Gallery

Sentry 200.PB.5
Sentry 200.PB.1
Sentry 250.PBRJ
Australian Made Logo

Sentry 250.PBRJ

Fully metal-clad, dual-skin, industrial personal access door.

A superior fully metal-clad industrial door for portable buildings

These doors are the product of special engineering for the exacting demands of modular and transportable buildings.

Semi-solid and fully clad in metal, these steel doors are pre-hung for 4 door frame options, with powder coating to suit. Featuring a doorframe seal to counteract the most arduous weather, these doors also include a high-calibre knob/lever exit set plus industrial-grade hinges.

Applications

Sentry 200.BF Portable Toilet Block Woodland Grey
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Sentry 200.BF

Dual-skin, heavy-duty metal-clad container door system.

An excellent access solution for upcycled shipping containers

The Sentry™ 200.BF is a fit for purpose PA door manufactured for fast and easy installation to meet the needs of installers when modifying shipping containers for industrial and commercial use, which is what makes it our most popular product in the shipping container range. 

Our Box Frame design has been engineered to protect the door jamb from distortion during the welding process or can be screw fixed to the container according to your installation needs. With a medium density polystyrene core, this pre-hung door can be fully customised with options such as viewing panels and air relief grilles and be immediately installed.

Available in the complete Classic & Contemporary ranges of COLORBOND steel colours, with standard door size of 2040mm(h) x 820mm(w), with 920mm(w) and 1100mm(w) available as standard, and high sizes or custom sizing available.

Applications

Image Gallery

Sentry 200.BF Portable Toilet Block
Sentry 200.BF Portable Toilet Block 1
Sentry 200.BF Portable Toilet Block 2
Sentry 200.BF Larnec Container
Sentry 200.BF Larnec Container 1
Sentry 200.CD
Australian Made Logo

Sentry 200.CD

Dual-skin, fully metal-clad container personal access door.

The ideal personal access door for modified shipping containers

A simple retrofitted external door solution for shipping containers. These metal clad, pre-hung doors require an RHS framework within the container wall. 

Externally fitted, these shipping container doors also come with a quality flush lock as standard. This door can be fitted anywhere on your container and has universal/reversible handling.

Available in the complete Classic & Contemporary ranges of COLORBOND steel colours, with standard door size of 2040mm(h) x 820mm(w), with 920mm(w) and 1100mm(w) available as standard.

Applications

modular fire exit doors

Sentry 700.80

Dual-skin, metal-clad fire door rated to Australian standards.

Why choose the Sentry® 700.80?

In Australia, the standards for fire-rated doors are AS 1905.1-2005. These standards set expectations for the frame and hardware, including the installation of an automatic door closer, and demand that fire doors be able to withstand direct flame for up to two hours.

Our Sentry® 700.80 meets these standards. We offer several optimisation options in addition to automatic door closers to further improve usability and safety. The fire-resistant material within our doors has been designed specifically to meet AS 1905 standards, guaranteeing your safety and maximising your site’s fire rating.

Applications

Image Gallery

modular fire doors
air relief grille

Air Relief Grille

Our Venttec Air Relief Grilles help relieve pressure in between rooms. They come in a range of sizes and are ideal for domestic and commercial installations.

Applications